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Posted to issues@flink.apache.org by GitBox <gi...@apache.org> on 2021/10/08 13:22:50 UTC
[GitHub] [flink-benchmarks] dawidwys commented on a change in pull request #35: [FLINK-24231] Benchmark for buffer debloating multiple gates
dawidwys commented on a change in pull request #35:
URL: https://github.com/apache/flink-benchmarks/pull/35#discussion_r725006103
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File path: src/main/java/org/apache/flink/benchmark/MultiInputCheckpointingTimeBenchmark.java
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@@ -0,0 +1,189 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.benchmark;
+
+import org.apache.flink.api.common.JobID;
+import org.apache.flink.benchmark.operators.RecordSource;
+import org.apache.flink.benchmark.operators.RecordSource.Record;
+import org.apache.flink.configuration.Configuration;
+import org.apache.flink.configuration.MemorySize;
+import org.apache.flink.configuration.TaskManagerOptions;
+import org.apache.flink.core.execution.JobClient;
+import org.apache.flink.runtime.jobgraph.JobGraph;
+import org.apache.flink.runtime.jobgraph.JobVertex;
+import org.apache.flink.runtime.jobgraph.JobVertexID;
+import org.apache.flink.runtime.testutils.CommonTestUtils;
+import org.apache.flink.streaming.api.datastream.DataStream;
+import org.apache.flink.streaming.api.environment.ExecutionCheckpointingOptions;
+import org.apache.flink.streaming.api.functions.co.CoMapFunction;
+import org.apache.flink.streaming.api.functions.sink.SinkFunction;
+import org.apache.flink.streaming.api.graph.StreamGraph;
+
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.Measurement;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.annotations.Warmup;
+import org.openjdk.jmh.runner.Runner;
+import org.openjdk.jmh.runner.RunnerException;
+import org.openjdk.jmh.runner.options.Options;
+import org.openjdk.jmh.runner.options.OptionsBuilder;
+import org.openjdk.jmh.runner.options.VerboseMode;
+
+import java.time.Duration;
+import java.time.temporal.ChronoUnit;
+import java.util.Arrays;
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+
+import static java.util.concurrent.TimeUnit.MILLISECONDS;
+import static java.util.concurrent.TimeUnit.SECONDS;
+import static org.apache.flink.api.common.eventtime.WatermarkStrategy.noWatermarks;
+
+/**
+ * The test verifies that the debloating kicks in and properly downsizes buffers in case of multi input gates with
+ * different throughput. In the end the checkpoint should take ~1(number of rebalance) * DEBLOATING_TARGET.
+ */
+@OutputTimeUnit(SECONDS)
+public class MultiInputCheckpointingTimeBenchmark extends BenchmarkBase {
+
+ public static final int JOB_PARALLELISM = 4;
+ public static final MemorySize START_MEMORY_SEGMENT_SIZE = MemorySize.parse("8 kb");
+ public static final MemorySize MIN_MEMORY_SEGMENT_SIZE = MemorySize.parse("64 b");
+ public static final Duration DEBLOATING_TARGET = Duration.of(300, ChronoUnit.MILLIS);
+ public static final MemorySize SMALL_RECORD_SIZE = MemorySize.parse("1b");
+ public static final MemorySize BIG_RECORD_SIZE = MemorySize.parse("1kb");
+ public static final int DEBLOATING_STABILIZATION_PERIOD = 2_000;
+
+ public static void main(String[] args) throws RunnerException {
+ Options options =
+ new OptionsBuilder()
+ .verbosity(VerboseMode.NORMAL)
+ .include(MultiInputCheckpointingTimeBenchmark.class.getCanonicalName())
+ .build();
+
+ new Runner(options).run();
+ }
+
+ @Benchmark
+ public void checkpointMultiInput(DebloatedCheckpointEnvironmentContext context)
+ throws Exception {
+ final CompletableFuture<String> checkpoint =
+ context.miniCluster.triggerCheckpoint(context.jobID);
+ checkpoint.get();
+ }
+
+ @State(Scope.Thread)
+ public static class DebloatedCheckpointEnvironmentContext extends FlinkEnvironmentContext {
+ public JobID jobID;
+
+ @Override
+ public void setUp() throws Exception {
+ super.setUp();
+ env.setParallelism(JOB_PARALLELISM);
+ env.enableCheckpointing(Long.MAX_VALUE);
+
+ DataStream<Record> source1 =
+ env.fromSource(
+ new RecordSource(
+ Integer.MAX_VALUE, (int) SMALL_RECORD_SIZE.getBytes()),
+ noWatermarks(),
+ RecordSource.class.getName())
+ .slotSharingGroup("source-small-records")
+ .rebalance();
+
+ DataStream<Record> source2 =
+ env.fromSource(
+ new RecordSource(
+ Integer.MAX_VALUE, (int) BIG_RECORD_SIZE.getBytes()),
+ noWatermarks(),
+ RecordSource.class.getName())
+ .slotSharingGroup("source-big-records")
+ .rebalance();
+
+ source1.connect(source2)
+ .map(
+ new CoMapFunction<Record, Record, Record>() {
+ @Override
+ public Record map1(Record record) throws Exception {
+ return record;
+ }
+
+ @Override
+ public Record map2(Record record) throws Exception {
+ return record;
+ }
+ })
+ .name("co-map")
+ .slotSharingGroup("map-and-sink")
+ .addSink(new SlowDiscardSink<>())
+ .slotSharingGroup("map-and-sink");
+
+ final StreamGraph streamGraph = env.getStreamGraph(false);
+ final JobGraph jobGraph = streamGraph.getJobGraph();
+ final List<JobVertex> vertices = jobGraph.getVerticesSortedTopologicallyFromSources();
+
+ final JobClient jobClient = env.executeAsync();
+ jobID = jobClient.getJobID();
+ CommonTestUtils.waitForAllTaskRunning(miniCluster, jobID, false);
+ List<JobVertexID> sourceIds =
+ Arrays.asList(vertices.get(0).getID(), vertices.get(1).getID());
+ BackpressureUtils.waitForBackpressure(
+ jobID, sourceIds, miniCluster.getRestAddress().get());
+ Thread.sleep(DEBLOATING_STABILIZATION_PERIOD);
Review comment:
The deduplication of code was something I struggled with, I put some thinking into. I agree we could duplicate it. I started with just another parameter in the other test. The reason why I split it in the end, was to be able to tweak individual parameters more easily.
If you really think its better to unify it further I can try, but personally I think easier modifications (that won't break the single input gate test) are worth a little bit of duplication.
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